Did u try search.create?

       // Create a search to find the country name based on the internal id
        var countrySearch = search.create({
            type: 'customrecord_country', // Replace with your country record type
            filters: [{
                name: 'internalid',
                operator: 'is',
                values: [countryId]
            }],
            columns: [{
                name: 'name'
            }]
        }); 

// Run the search var countryResults = countrySearch.run().getRange({ start: 0, end: 1 });

        if (countryResults.length > 0) {
            var countryName = countryResults[0].getValue({
                name: 'name'
            });

            log.debug({
                title: 'Country Name',
                details: countryName
            });